Results 261 to 270 of about 81,503 (309)

Longitudinal perturbations of plasma nuclear magnetic resonance profiles in neonatal encephalopathy

Pediatric Research, 2023
Neonatal encephalopathy (NE) is a major cause of mortality and severe neurological disability in the neonatal period and beyond. We hypothesized that the degree of brain injury is reflected in the molecular composition of peripheral blood samples.A sub-cohort of 28 newborns included in the HYPOTOP trial was studied.
Cascant-Vilaplana MM, Lara-Cantón I, Nunez-Ramiro, Antonio, Solaz-García Á, Llorens-Salvador R, Quintás G, Kuligowski, Julia, Vento, Maximo   +7 more
openaire   +3 more sources

Penetration of resonant magnetic perturbations in turbulent edge plasmas

Nuclear Fusion, 2014
Comprehension of the interactions between tokamak edge plasmas and externally induced resonant magnetic perturbations (RMPs) is an important step in the understanding of the control of edge-localized modes by these RMPs. Such control has been demonstrated experimentally, but previous theoretical investigations have revealed a possible screening of RMPs
A. Monnier, G. Fuhr, P. Beyer, F.A. Marcus, S. Benkadda, X. Garbet   +5 more
openaire   +1 more source

Screening of resonant magnetic perturbations by flows in tokamaks

Nuclear Fusion, 2012
Abstract The non-linear reduced four-field RMHD model in cylindrical geometry was extended to include plasma rotation, neoclassical poloidal viscosity and two fluid diamagnetic effects. Interaction of the static resonant magnetic perturbations (RMPs) with the rotating plasmas in tokamaks was studied.
M. Becoulet, F. Orain, P. Maget, N. Mellet, X. Garbet, E. Nardon, G.T.A. Huysmans, T. Casper, A. Loarte, P. Cahyna, A. Smolyakov, F.L. Waelbroeck, M. Schaffer, T. Evans, Y. Liang, O. Schmitz, M. Beurskens, V. Rozhansky, E. Kaveeva   +18 more
openaire   +1 more source

Nuclear magnetic double resonance: Perturbation of double quantum transitions

Journal of Magnetic Resonance (1969), 1971
Abstract NMR double resonance spectra, where the second rf field is centered on a double quantum transition, are discussed. The theoretical treatment is performed by a transformation to the rotating frame, and the close connection to the treatment of double quantum spectra is brought out.
B Gestblom, O Hartmann
openaire   +1 more source

Influence of resonant magnetic perturbations on plasma edge turbulence

Physics of Plasmas, 1997
This work reports alterations on plasma-edge equilibrium profiles and on edge turbulence, and anomalous transport induced by resonant perturbing magnetic fields in the TBR (Brazilian Tokamak) tokamak [J. Fusion Energy 12, 295 (1993)]. Thus, these perturbations have reduced the equilibrium parameters and the spectral power of the fluctuations and ...
R. M. Castro, M. V. A. P. Heller, I. L. Caldas, Z. A. Brası́lio, R. P. da Silva, I. C. Nascimento   +5 more
openaire   +1 more source

Tearing mode velocity braking due to resonant magnetic perturbations

Nuclear Fusion, 2012
Abstract The effect of resonant magnetic perturbations (RMPs) on the tearing mode (TM) velocity is studied in EXTRAP T2R. Experimental results show that the RMP produces TM braking until a new steady velocity or wall locking is reached.
L. Frassinetti, S. Menmuir, K.E.J. Olofsson, P.R. Brunsell, J.R. Drake   +4 more
openaire   +1 more source

Resonant Collision in Strong Magnetic Field. I. Perturbation Theory of Cyclotron Resonance

Journal of the Physical Society of Japan, 1983
The potential scattering of charged particles in a strong magnetic field is formulated. The collision cross section is defined in such a way that the rate of scattering agrees with the field-free rate in the weak-field limit. A threshold law for the Landau-state excitation is derived.
openaire   +1 more source

Magnetic Field Structure Induced by Resonant Magnetic Perturbations in Tokamaks

2013
In this chapter we consider essential features of the structure of magnetic field in tokamaks in the presence of the externally applied resonant magnetic perturbations (RMPs).
openaire   +1 more source

Resonant magnetic perturbation effects on pedestal structure and ELMs

Nuclear Fusion, 2012
Abstract The plasma transport processes by which externally applied resonant magnetic field perturbations (RMPs) mitigate or suppress edge-localized modes (ELMs) in low-collisionality tokamak H-mode plasmas are explored. Experimental data from DIII-D indicates the dominant RMP-induced transport occurs at the pedestal top where electron ...
J.D. Callen, A.J. Cole, C.C. Hegna, S. Mordijck, R.A. Moyer   +4 more
openaire   +1 more source

Nuclear magnetic double resonance using weak perturbing RF fields

Journal of Chemical Education, 1977
Provides an example of spin tickling and discusses the most direct approach for verifying the relative signs of coupling constants in three-spin cyclopropyl systems.
openaire   +1 more source